在铸造生产中,经常用划线来检查铸件尺寸。有色金属件因表面具有光亮的色泽,划线前必须在该部位涂色。常用的涂液有紫碘溶液和硫酸铜溶液。这两种溶液都存在着手摸后容易掉色和时间稍长涂层剥落的问题。目前我们配制了一种新涂色,即染色剂溶液,其配方为:99％的漆片液(10％的漆片+90％的酒精)+1％的普鲁士蓝(F_(e4)〔F_e(CN)_6〕_3—生物染色剂),溶 In casting production, scribing is often used to check the size of the castings. Non-ferrous metal parts due to the surface with a bright color, crossed the line before the color must be painted in this area. Commonly used coating solution purple iodine solution and copper sulfate solution. Both of these solutions have the problem of peeling off slightly longer after the touch is applied. At present, we have formulated a new coating color, that is, a dye solution, which has the formula of 99% lacquer liquid (10% lacquer + 90% alcohol) and 1% Prussian blue (F_e4) (CN) _6〕 _3-biological stain), dissolved